Well I haven't seen all the Potter films so I wont give my opinion as to which Saga of films I prefer but I read the Potter books and I like them for what they are: splendid stories of good against evil, of friendship and hope written by J.K Rowling which I consisder to be a mistress of storytelling. It's a pleasure to read and I found hard to get out of them once you start reading them.

Why on earth are these threads cropping up all of a sudden? They're annoying and don't contribute much to anyone's understanding of the world (The majority of people on a Star Wars forum prefer Star Wars? I never knew...).

As rumssmuggler rightly said and as I have already pointed out in the thread LOTR vs Star Wars, it doesn't seems fit to compare novels adaptations with originally created film. It becomes a biased comparison as one of the subject is an adaption not so much as a creation as is Star Wars. I do not want to take anything away from the Potter films and I haven't seen them all anyway but Harry Potter is at it's roots, seven books written by J.K Rowling. It is no such cases with Star Wars whose script is originally written by it's film maker: George Lucas

I think it will be more suitable if you ask which Universe, which world people prefer. Then you will probably get more accurante and less confusing answers.